Related Clues:

• Be scared of
• Cause of trouble
• Abject terror
• With 51-Down, cry of sorrow
• Butterflies, say
• Antsy feeling
• Pacing-the-floor state
• Intense apprehension
• Really fear
• Quaking-in-one's-boots feeling
• No mere worry
• Fear, and then some
• Job's lot?
• Live in fear of
• Restless feeling